[hal] Initial SystemCore empty HAL (#7454)

hal/src/main/native/systemcore/SimDevice.cpp

@@ -0,0 +1,53 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#include "hal/SimDevice.h"
+
+extern "C" {
+
+HAL_SimDeviceHandle HAL_CreateSimDevice(const char* name) {
+  return 0;
+}
+
+void HAL_FreeSimDevice(HAL_SimDeviceHandle handle) {}
+
+const char* HAL_GetSimDeviceName(HAL_SimDeviceHandle handle) {
+  return "";
+}
+
+HAL_SimValueHandle HAL_CreateSimValue(HAL_SimDeviceHandle device,
+                                      const char* name, int32_t direction,
+                                      const struct HAL_Value* initialValue) {
+  return 0;
+}
+
+HAL_SimValueHandle HAL_CreateSimValueEnum(HAL_SimDeviceHandle device,
+                                          const char* name, int32_t direction,
+                                          int32_t numOptions,
+                                          const char** options,
+                                          int32_t initialValue) {
+  return 0;
+}
+
+HAL_SimValueHandle HAL_CreateSimValueEnumDouble(
+    HAL_SimDeviceHandle device, const char* name, int32_t direction,
+    int32_t numOptions, const char** options, const double* optionValues,
+    int32_t initialValue) {
+  return 0;
+}
+
+void HAL_GetSimValue(HAL_SimValueHandle handle, struct HAL_Value* value) {
+  value->type = HAL_UNASSIGNED;
+}
+
+void HAL_SetSimValue(HAL_SimValueHandle handle, const struct HAL_Value* value) {
+}
+
+void HAL_ResetSimValue(HAL_SimValueHandle handle) {}
+
+hal::SimDevice::SimDevice(const char* name, int index) {}
+
+hal::SimDevice::SimDevice(const char* name, int index, int channel) {}
+
+}  // extern "C"